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189636-73-5

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189636-73-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 189636-73-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,8,9,6,3 and 6 respectively; the second part has 2 digits, 7 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 189636-73:
(8*1)+(7*8)+(6*9)+(5*6)+(4*3)+(3*6)+(2*7)+(1*3)=195
195 % 10 = 5
So 189636-73-5 is a valid CAS Registry Number.

189636-73-5Relevant articles and documents

Diastereo-differentiating intramolecular cyclopropanations of prochiral olefins and a diazo ester linked by optically active 2,4-pentanediol

Mori, Atsushi,Sugimura, Takashi,Akira, Tai

, p. 661 - 664 (1997)

Intramolecular cyclopropanation of 3, the substrate having a chiral auxiliary as a linking bridge between a diazo ester and cyclohexene, was found to give the cyclopropane 4 having over 99% diastereomeric excess (d.e.) in 91.5% yield. The reaction was als

Temperature-independent stereocontrolled [2+2] cycloaddition. Potential of the 2,4-pentanediol tether in asymmetric reactions as a differential activation entropy promoter

Sugimura, Takashi,Tei, Takahiro,Mori, Atsushi,Okuyama, Tadashi,Tai, Akira

, p. 2128 - 2129 (2007/10/03)

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